Upside-down apple cake with calvados glaze

Method

1. Heat the oven to 180°C/fan160°C/ gas 4. Grease and line a 23cm round cake tin. In a large mixing bowl, beat the butter and 225g caster sugar with an electric hand mixer until light and fluffy. Add the eggs, one at a time, beating well after each addition. Fold in the ground almonds, flour, salt and cinnamon until combined, then fold in the chopped apples.
2. Arrange the apple slices in the base of the prepared cake tin, then spoon over the cake batter. Bake for 50-60 minutes on the middle shelf until a skewer pushed into the centre of the cake comes out clean. Cool in the tin for 10 minutes, then turn out onto a wire rack to cool completely.
3. When the cake is completely cool, make the glaze (see tips). Put the 100g caster sugar in a frying pan over a low heat and gently melt, swirling the pan occasionally. Once melted, let it bubble to a rich caramel, then remove from the heat. Add the diluted calvados (be careful as it will splutter), then pour the glaze into a small bowl to cool a little. Brush the glaze all over the cake just before slicing.